Rechargeable, button, and UPS Batteries
Batteries are made of materials that can be toxic to the environment if not properly disposed of. These materials include acid, nickel, lead, lithium, cadmium, alkaline, mercury, and nickel metal hydride. While alkaline batteries are no longer classified as hazardous, all other types including rechargeable, button, or uninterruptible power supply (UPS) batteries are actually combustible and could cause a fire. Really!